.page-left {
    background-color: #2e2e2e;
}

.page-center {
    background-color: #f7f7f7;
}

.page-right {
    background-color: #f5f5f5;
    border-left: solid 1px #ccc;
}

.action-btn-group{
    background-color: red;
}

.action-btn-group-child{
    background-color: green;
}